The world would look radically different without rulers and measuring tapes that fit into a pocket. Carpenters, fashion designers and engineers rely on these trusty tools to check the size of ...
Akio Kawasaki is at the National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8563, Japan. Clocks consist of three components: ...
Two independent teams have built operating nuclear clocks—devices that might one day rival the best atomic clocks and offer new ways to probe fundamental physics. Photograph of the thorium-229-doped ...
When the sun hits its highest point over the meridian line that travels north and south from the 351-year-old Royal Observatory Greenwich in London, it’s noon Greenwich Mean Time, a tangible and ...
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The all-new Echo Time is a smart alarm clock with hundreds of customizable clock faces, smart alarms, and a beautiful ...
The duration of short ångström-wavelength X-ray pulses, which lasted merely 170 attoseconds, has finally been measured ...
The world’s network of atomic clocks is already mind-bogglingly accurate. They also underpin a slew of modern necessities, from GPS to internet communication. Atomic clocks work by tuning a laser to ...
Nearly eight decades after the invention of the atomic clock, scientists in Vienna and Beijing have independently developed the world’s first two operating nuclear clocks, marking a significant ...
For decades, researchers around the world have been working toward this goal—and now major advances are following in rapid succession. Vienna is now home to the world's first nuclear clock that ...
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